diff --git a/src/Plugin/Field/FieldType/MobileNumberItem.php b/src/Plugin/Field/FieldType/MobileNumberItem.php
index 3d2a641..cf18b67 100755
--- a/src/Plugin/Field/FieldType/MobileNumberItem.php
+++ b/src/Plugin/Field/FieldType/MobileNumberItem.php
@@ -131,6 +131,9 @@ class MobileNumberItem extends FieldItemBase {
     $util = \Drupal::service('mobile_number.util');
     $values = $this->getValue();
 
+    $number = NULL;
+    $country = NULL;
+
     if (!empty($values['country'])) {
       if (!empty($values['local_number'])) {
         $number = $values['local_number'];